3rd Round-Nausea

Ashley
Hi ladies!
I am waiting for AF around the 15th and since around New Years I have been having a lot of nausea. Around the 4th I got a low grade fever for 4 hrs and was vomiting. I went to the doctor because I wasn't feeling better and had blood and urine preg tests both negative. That was 9 days before my period is supposed to start. I'm not sure if this is the Clomid/pms symptoms or if I could be pregnant and just not be able to test for it yet.  The doc and I concluded it is the stomach flu and prescribed me some zofran but it doesn't phase the nausea at all. 
Anyone else have these issues and what were your results?  Sick or pregnant or PMS?